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    \$\begingroup\$ (⎕UCS ⍵)+32×⍵∊⎕A819⌶⍵ \$\endgroup\$ Commented Aug 31, 2018 at 7:45
  • \$\begingroup\$ I've never seen that operator before. What version does it work in? \$\endgroup\$ Commented Aug 31, 2018 at 17:14
  • \$\begingroup\$ It is called the i-beam. It is an operator in all versions of Dyalog APL. It was originally a function in old versions of IBM's APL for special calls to the IBM system. Get it? I-B-M — i-beam? \$\endgroup\$ Commented Aug 31, 2018 at 17:32
  • \$\begingroup\$ Documentation for in general and for service 819 ("819" ≈ "BIg"). Try it online! \$\endgroup\$ Commented Aug 31, 2018 at 17:40
  • \$\begingroup\$ Well, I've learned something new. tryapl.org doesn't seem to recognize it, so do you mind if I just use your TIO link? \$\endgroup\$ Commented Aug 31, 2018 at 18:17